.header {
  position: sticky;
  top: 0;
  z-index: 99;
  display: flex;
  justify-content: space-around;
  height: 50px;
  /* background-color: red; */
  align-items: center;
  width: 100%;
  border-bottom: 1px solid #ccc;
  background-color: white;
}

.banner {
  width: 100%;
  height: 200px;
}